Mapping based on distance to target

[frascow]

Hi there,

I'm trying to generate mapping coordinates based on the distance from a particle to it's Target. 
Im publishing through a Property test the distance to the target per frame and using this variable for the mapping, but even if this value is changing per frame and the the mapping timing is set to continuos the generated mapping seems static.

I guess I'm doing something wrong but can't find it.